JEE (Main) 2022 Chemistry and Physics Practice Questions
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Questions and Answers

What is the yield of XYZ3 in grams?

180

What is the % composition of oxygen in the organic compound?

40.00%

What is the molarity of the resulting product Na2SO4 in the solution?

0

What is the limiting reagent of the reaction and the number of moles of NH3 formed?

<p>N2, 0.71 moles</p> Signup and view all the answers

How much HNO3 is required to produce 110.0 g of KNO3?

<p>91.5 g</p> Signup and view all the answers

What is the correct answer for the expression 0.02858 * 0.112 * 0.5702 using the rules for significant figures?

<p>0.0056</p> Signup and view all the answers

What is the volume of unused nitrogen gas when 56.0 L of nitrogen gas is mixed with excess hydrogen gas and 20 L of ammonia gas is produced?

<p>36.0 L</p> Signup and view all the answers

How many atoms of Mg are present in a 2 L solution of Mg with a concentration of 48 ppm?

<p>2.88 × 10^20 atoms</p> Signup and view all the answers

What is the molarity of the remaining nitric acid solution when 800 mL of 0.5 M nitric acid is heated, its volume is reduced to half, and 11.5 g of nitric acid is evaporated?

<p>6.09 × 10^-2 M</p> Signup and view all the answers

How many Fe atoms are present in 3.3 g of haemoglobin containing 0.34% iron by mass?

<p>1.21 × 10^20</p> Signup and view all the answers

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